Technologies
Modular Jack Wiring
USOC Configurations
Universal Service Ordering Codes (USOC) are a series of Registered Jack (RJ) wiring configurations developed by the Bell System for connection of customer premise equipment to the public network. FCC regulations control the application of these configurations when used for this purpose.
USOC RJ61
USOC RJ25
USOC RJ14
USOC RJ11
USOC RJ31X
USOC RJ48X
USOC RJ48S
USOC RJ45S
TIA/EIA-568-A Configurations
Two standards were adopted. Both utilize pin/pair assignments that provide superior transmission performance over other 4-pair wiring configurations.
T568A
- Preferred method
- Directly compatible with 2-pair voice and Token Ring systems utilizing 6-position connectors.
T568B
- Optional method
- AT&T's standard
- Directly compatible with AT&T phone systems
LAN Configurations
Local Area Network Standards designed to operate over UTP designate pin/pair assignments on modular connectors for signal transmission. While the TIA/EIA configurations (T568A and T568B) support all of these designations, there are some cases where the user chooses to cable only the number of pairs required to support the application.
10BASE-T
(IEEE 802.3)
10 Mbps Ethernet over UTP
Token Ring
(IEEE 802.5)
4/16 Mbps Token Ring over copper
TP-PMD
(ANSI X3T9.5)
100 Mbps FDDI over copper (pending)